Spring Tool Suite, STS

Quiz

Spring Tool Suite, STS is an IDE (Integrated Development Environment) and is ideal for developing Spring Boot applications.

Download and install STS

STS can be downloaded from https://spring.io/tools.
Select the Operating System (Windows in this case).
Download the zip file and extract.
Click on the SpringToolSuite4.exe file.
Spring Tool Suite 4 Launcher dialog asks for a workspace location. Enter the location, and press the "Launch" button.

Creating a simple Spring Boot application in STS

Go to File -> New Maven Project.
Click Next. The following dialog appears:
Select maven-archetype-quickstart
For GroupId, enter com.tutorialspoint, for ArtifactId enter first-spring-boot-example.
Click Finish.
Upon completion, there will be folder structure created −

Open the pom.xml file. Add the following under dependencies.

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-autoconfigure</artifactId>
   <version>3.3.3</version>
</dependency>

Also, add the spring framework core jars to the build path by right-clicking on project -> Build path -> Add external archives

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
   <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.tutorialspoint</groupId>
   <artifactId>first-spring-boot-example</artifactId>
   <version>0.0.1-SNAPSHOT</version>
   <name>first-spring-boot-example</name>
   <!-- FIXME change it to the project's website -->
   <url>first-spring-boot-example</url>
   <properties>
      <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
      <maven.compiler.release>17</maven.compiler.release>
   </properties>
   <dependencyManagement>
      <dependencies>
         <dependency>
            <groupId>org.junit</groupId>
            <artifactId>junit-bom</artifactId>
            <version>5.11.0</version>
            <type>pom</type>
            <scope>import</scope>
         </dependency>
      </dependencies>
   </dependencyManagement>
   <dependencies>
      <dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-autoconfigure</artifactId>
         <version>3.3.3</version>
      </dependency>
      <dependency>  
         <groupId>org.springframework.boot</groupId>  
         <artifactId>spring-boot-starter-web</artifactId>  
         <version>2.2.1.RELEASE</version>  
      </dependency>  
      <dependency>  
         <groupId>org.springframework.boot</groupId>  
         <artifactId>spring-boot-starter-parent</artifactId>  
         <version>2.2.1.RELEASE</version>  
         <type>pom</type>  
      </dependency>  
      <dependency>
         <groupId>org.junit.jupiter</groupId>
         <artifactId>junit-jupiter-api</artifactId>
         <scope>test</scope>
      </dependency>
      <!-- Optionally: parameterized tests support -->
      <dependency>
         <groupId>org.junit.jupiter</groupId>
         <artifactId>junit-jupiter-params</artifactId>
         <scope>test</scope>
      </dependency>
   </dependencies>
   <build>
      <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
         <plugins>
            <!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
            <plugin>
               <artifactId>maven-clean-plugin</artifactId>
               <version>3.4.0</version>
            </plugin>
            <!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
            <plugin>
               <artifactId>maven-resources-plugin</artifactId>
               <version>3.3.1</version>
            </plugin>
            <plugin>
               <artifactId>maven-compiler-plugin</artifactId>
               <version>3.13.0</version>
            </plugin>
            <plugin>
               <artifactId>maven-surefire-plugin</artifactId>
               <version>3.3.0</version>
            </plugin>
            <plugin>
               <artifactId>maven-jar-plugin</artifactId>
               <version>3.4.2</version>
            </plugin>
            <plugin>
               <artifactId>maven-install-plugin</artifactId>
               <version>3.1.2</version>
            </plugin>
            <plugin>
               <artifactId>maven-deploy-plugin</artifactId>
               <version>3.1.2</version>
            </plugin>
            <!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
            <plugin>
               <artifactId>maven-site-plugin</artifactId>
               <version>3.12.1</version>
            </plugin>
            <plugin>
               <artifactId>maven-project-info-reports-plugin</artifactId>
               <version>3.6.1</version>
            </plugin>
         </plugins>
      </pluginManagement>
   </build>
</project>

Create a new Java class under src/main/java with package name com.tutorialspoint.first_spring_boot_example. Name the class FirstSpringBootTestClass.

FirstSpringBootTest.java

package com.tutorialspoint.first_spring_boot_example;

import org.springframework.boot.SpringApplication;    
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class FirstSpringBootTest {

   public static void main(String[] args) {   
      System.out.println("Hello World, this is First Spring Boot Test");
      SpringApplication.run(FirstSpringBootTest.class, args);
   }
}

Output

From project explorer, right-click on the file FirstSpringBootTest, then Run as -> Java application.

On the console, you will see −

Hello World, this is First Spring Boot Test

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